Box-operating mechanism for looms



Aug. 21, 1934. BQARTSON 1,970,833

BOX OPERATING MECHANISM FOR LOOMS Filed Jan. 27, 1953 4. INVENTOR flwmrJ B/IRTSO/V BY ,4. A43.

A'ITORN EY Patented Aug. 21, 1934 ;PATENT orl-"lce I This inventionrelates to looms in which the shuttle-box movements depend upon shiftingof the shuttle-box operating mechanism-into posi tion to be actuated bydriving means in theloom;

as in the case where said mechanism includes a vibrator-gear journaledin a vibrator-lever between two mutilated cylinder gears forming a partof the so-called driving means, said vibrator gear being brought intomesh with said cylinderm gears, alternately, by shifting the lever; Thisshifting must take place when the shed i's'open relation to one or theother of said, mutilated cylinder gears, for rotation thereby, and consequent shifting of the boxes, upon the shed being closed. Heretofore' boxoperating mechanismsto satisfactorily control or effect the shifting ofthe vibrator lever, have been open to-the objections that they arecomplicated and inefilcient; requiring frequent adjustment and repair. 7It is the object of this invention to provide a simple and positiveacting box indicator mechanism. 1 5 In accordance with thisinventionmeans are provided to move a rod attached tothe vibratormechanism into direct operative relation with actuating means on theloom when the shed is open to position a vibrator gear in operativerelation with one of the cylinder gears for rotation thereby. Referringto the drawing: Fig. 1 is a side elevation of a jacqu embodying theinvention;

Fig. 2 isa rear elevation of a portion of the invention shown in Fig. lon a larger scale. x

Fig. 3 is a side elevation of a portion ofthe invention mounted on aloom of the dobby -head type. i

Fig. 4 is a front elevation of the chain and levers shown in Fig. 3.

- Fig. 5 is a top view of a portion of Fig. 2 showing the'adjustablelever mounting.

Referring to Fig. 1 there is shown the loom frame 1; lifter rod 2 forthe boxes 3; the'lever 4 to which the lifter rod is connected;"the-bellcrank levers 5 fulcrumed in the loom-frame and connected bylinks 6 to different points in the length of and thus supporting thelever 4; the vibrator-gear connectors 7; the vibratory gears 8 to whichat an eccentric point of each,- there is pivoted a connector and eachof'which'is journaled in a vibrator lever 9 fulcrumed in the frame 1 at10; the mutilated cylinder gears 11 and the: usual crank shaft 1'7.

55 There is also shown the usual lock bar 12 having rd loom a roll 13mounted on a rod 14 and engaged by a cam15 rotatable with the lowercylinder gear 11; The lock bar 12 is adapted to be positioned above 'orbelow projections 16 on the vibrator levers, 9, thus'locking thevibrator levers in lowered or'raised position. When the lock bar 12 isforced to the right by the cam 15 the vibrator levers 9 are unlocked andmay beraised or lowered by the box indicator. All of the parts thus fardescribed are of the usual construction and in themselves form no partof this invention which relates more particularly to the drop boxindicator shown in Figures 1 and 2.

Pivotally attachedat 18 to the vibrator levers 9 are rodslQ which extendupwardly and pass at their upper ends through openings or guides 32 inand adjacent to the free ends of levers 20. Leversz'o are rotatableabout a shaft 21 mounted on a'support 41 whlchlimits their motion in onedirection to normally holdthe rods 19 just free of the path of rotationof a pivoted plate 30 as will hereinafter be explained. The support 41is adapted to be adjustably mounted on bracket 22 and is held inplacethereon by holding members 42 attached to the bracket 22 which extend'upbe-' tween the slots40 in the support 41 and engage the upper sidethereof. The bracket 22 is attached in any suitable manner to the frame1 of the loom.

That portion of the crank shaft 17 which extends beyond the frame 1 orthe loom, as shown in Fig; 2f, hasmounted thereon by any suitable meansa cam 29 which revolves with the crank shaft 17. v A plate 30 isi'ulcrumed at 31 to a shaft attached tothe frame 1 of the loom in such amanner that itsfi'ee end "rests on the shaft 17. Thus asshaft 17rotates, the free end of plate 30 is raised and lowered bymeans of cam29. Cam 29 should be .so positioned that the lifting of plate 30 is intimed relation to the movement of cam" 13 on the lower cylinder gear 11which releases the vibrator levers 9. Blocks 28 are attached to therods19 in such a position that they are normally out of'the path ofrotation of the late 30 but when the rods are tilted inwardly by thelevers. as will be hereinafter described they will be engaged bythe freeend of the plate 30.- Adjusting screws 33 are-provided on the blocks28in order that the blocks may be adjusted on the rods 19. i

Attached to eye bolts 23 or any other suitable means are cords 24. whichextend upward, pass through openings in a guide and are attached to thelower ends o'f'jacquard hooks 26. The

' gagement with its respective cylinder gear.

guide 25 is attached to the frame 1 of the loom in such a position thata slight pull on one of the cords 24 will cause a lever 20 to rotateabout the shaft 21.

Thus when one of the jacquard hooks 26 to which a cord 24 is attached,is raised by a grifi blade 27, there will be exerted an upward pull on alever 20 through the medium of cord 24, causing it to pivot about itsfulcrum 21. As the lever 20 rotates about its shaft the rod 19 whichextends through the opening 32 in the lever, is tilted toward the crankshaft 1'? a sufficient amount to bring the block 28 attached to the rod19 into the path of rotation of the plate 30. As the plate is raised bymeans of the cam29 on the rotating crank shaft 1'7 its free end engagesthe under side of the block 28 and lifts it, thus lifting rod 19 and thevibrator lever 9 to which the rod is attached. At the same time that thecam 29 engages and lifts the plate 30 the cam 15 releases the vibratorlevers 9 so that they may be moved. When the vibrator lever is in itsnew position the cam 15 allows lock bar 12 to return, thus locking thevibrator lever in its new position. The vibrator lever will remain inthat position until the hook 26 is no longer held in its raised poistionby the griif, due to a change in pattern. When the hook to which cord 24is attached is'free to descend, lever 20 returns to its normal position,thus tilting rod 19 about'itspivot away from the plate 30 and removingblock 28 from the path of rotation of. the plate 30. A portion of thesupport 41 forms a barrier to the movement of. lever 20 about its shaft21 when the block 5 28 on the rod19 is. just clear of the plate 30 sothat a slight upward pull by the 'cord24 will bring.

the block 28 into co'operativarelation with the plate 30. When the cam15 next forces the lock bar 12 to the right the vibrator lever dropsback into normal position where it will be out of'en- My invention isalso adapted'to be used in a loom of the type having a chain with camsthereon, set according to a definite pattern to be made,

i for controlling the movement of the boxes and driven by a chain gearoperatively connected to driving means in the loom such as in a loom ofthe dobby-head type. In a loom of this type as shown in Figs. 3 and 4 achaingear 37 is attached by suitable, mechanism (not shown) toa drivingmeans on loom 1. Anendless chain 36 having cross links 39 is mounted forrotation on said gear 3'7. Attached tothe cross links 39' at predeter'mined places according'to adefinite pattern to be 'woven are rollers orcams 38'." Pivoted at on a frame mounted on loom 1 are levers34, thefree ends of which are adapted to rideon the cross links 39 as the chain36 is rotated by the gear 37. When a roller or cam 38 engages the properlever 34 as shownin Fig. 4 it lifts the free end of said lever exertinga pull. through the medium of a cord 24 to pivot a lever 20 about itsfulcrum 21. The invention then functions in a manner similar to that ashereinbefore' explained with regard to a jacquard mechanism.

What is claimed is: t I 1. A box indicator for looms having a jacquardmechanism, a plurality of drop boxes and actuating mechanism includingvibrator levers therefor, said indicating meanscomprising rotatable rodsmounted on said vibrator levers, adjustable means on said rods, aplurality of levers pivoted at one end, the free ends of said rodspassing through guides in the free ends of saidlevers, constantly movingactuating means on said loom,

said actuating means being adapted to engage said adjustable means onsaid rods when said rods are rotated toward it and pattern controlledmeans adapted to pivot said levers about their fulcrum to cause saidactuating means to engage said adjustable means on said rods.

2. A box indicator for looms having a jacquard mechanism, a plurality ofdrop boxes and actuating mechanism including vibrator levers therefor,said indicating means comprising pivotedly mounted rods on said vibratorlevers, blocks mounted on said rods, a plurality of pivotedly mountedlevers, means on the free ends of said levers to loosely engage the freeends of said rods, flexible means linking said levers to hooks in saidjacquard mechanism, constantly rotating means in said loom, a pivotallymounted plateon said loom, said plate being so mounted that its free endrests on said constantly rotating means, a cam mounted on saidconstantly rotating means to alternately lower and raise said plate, thefree end of said plate being adapted to engage'said blocks to raise saidrods when said rods are pivoted toward said constantly rotating means bysaid pivoted levers.

3. A box indicator for looms having a jacquard mechanism, a plurality ofdrop boxes and actu ating mechanism therefor, including vibrator levers,said indicator comprisingrods pivotally mounted on said vibrator levers,a plurality of pivoted levers mounted on' said loom, the free ends ofeach of said levers loosely engaging the free ends of said pivoted rods,flexible means linking said levers to hooks in said jacquard mechanism,a guide for said flexible means so positioned on said loom that anupward movement'by said hooks causes said levers to rotate upwardlythuscausing said rods to rotate toward said levers, blocks rigidlyattached to said rods a predetermined distance from said rods fulcrum,and constantly rotating actuating means on said loom, said means beingadapted to engage 'and raise said blocks when said rods are rotated bysaid levers. I

4. A box operating mechanism for looms having a plurality of drop boxes,comprising in combination a plurality of vibrator levers, a rodpivotally attached at one end to each of saidvibrator levers, constantlyrotating actuating means on said loom, means on said rods adapted to beengaged and lifted by said actuating means, when moved into the path ofrotation thereof by said rods thereby causing said rods and vibratorlevers to be lifted and pattern-controlled means controlling the'pivotalmovement of said rods so as to move'said means thereon in-and out of thepath of rotation of said actuating means.

5. A box operating mechanism for looms having a plurality of drop boxes,comprising in combination a plurality of vibrator levers, 'pivotedlymounted rods on said levers, constantly rotating actuating means on saidloom, means on said rods adapted to be engaged by and lifted by saidconstantly actuating means, when moved into the path of rotation thereofby said rods thereby causing said rods and vibrator levers to be lifted,means controlling the pivotal movement of said rods on said vibratorlevers and patterncontrolled means controlling said controllingofrotation, constantly rotating actuating means on said loom, means onsaid rods adapted to be engaged by and lifted by said constantlyrotating actuating means, when moved into the path of rotation thereof,thereby causing said rods and levers to be lifted, and automatic meanscontrolling said first means and adapted to cause the latter to rotatesaid rods toward said constantly rotating actuating means thereby movingsaid means on said rods within the path of rotation of said actuatingmeans.

7. A box operating mechanism for looms having a plurality of drop boxes,comprising in combination a plurality of vibrator levers, pivotallymounted rods in said vibrator levers, constantly rotating actuatingmeans on said loom, means on said rods adapted to be engaged by andlifted by said actuating means, when moved into the path of rotationthereof, thereby causing said rods and vibrator levers to be lifted, andmeans controlling the engagement of said means with said actuatingmeans, said means comprising a plurality of pivoted levers engaging thefree ends of said rods and means operative according to a predeterminedpattern to be made to control the rotation of said pivoted levers.

8. A box operating mechanism for looms having a plurality of drop boxes,comprising the combination of a plurality of vibrator levers, verticallydisposed rods rotatably supported at their lower ends on said vibratorlevers, means mounted on said rods, a constantly rotating actuatingmeans on said loom, said actuating means being adapted to engage andraise said means on said rods when the latter are moved into its path ofrotation thus lifting said rods and said vibrator levers, and pivotallymounted pattern-controlled guides operatively associated with the freeends of said rods and adapted to rotate said rods about their pivotstoward said actuating means an amount sufficient to position the meansmounted thereon within the path of rotation of said actuating means.

ALBERT J. BARTSON.

